Zirconium Disk

Hafnium (more than 0.2% Zirconium) Disk is a dense, corrosion-resistant refractory metal form notable for its high neutron absorption cross-section, excellent thermal stability, and resistance to oxidation. The disk format allows precise use in experimental setups and electronic devices requiring dimensional accuracy. Industries including nuclear energy, aerospace, and electronics employ hafnium-zirconium disks in control systems, high-temperature components, and vacuum electronics. Specific applications include nuclear reactor control elements, aerospace turbine blade coatings, and electrodes in plasma generation systems. In research, these disks are studied for phase behavior, corrosion mechanisms, and high-temperature creep resistance in demanding environments. The combination of neutron absorption, thermal resilience, and chemical stability ensures hafnium disks are indispensable in nuclear technology, advanced electronics, and materials research.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Disc

Thickness	>0.05mm	±10%
Thickness	<0.01mm	±25%
Thickness	0.01mm - 0.05mm	±15%

Material Properties for Metals

Atomic Properties

Element	Value
Atomic number	40
Crystal structure	Hexagonal close packed
Electronic structure	Kr 4d² 5s²
Valences shown	2,3,4
Atomic weight( amu )	91.22
Thermal neutron absorption cross-section( Barns )	0.182
Photo-electric work function( eV )	3.8
Natural isotope distribution( Mass No./% )	96/ 2.8
Natural isotope distribution( Mass No./% )	92/ 17.1
Natural isotope distribution( Mass No./% )	91/ 11.2
Natural isotope distribution( Mass No./% )	94/ 17.5
Natural isotope distribution( Mass No./% )	90/ 51.4
Atomic radius - Goldschmidt( nm )	0.16
Ionisation potential( No./eV )	4/ 34.34
Ionisation potential( No./eV )	Jun-99
Ionisation potential( No./eV )	2/ 13.13
Ionisation potential( No./eV )	1/ 6.84
Ionisation potential( No./eV )	5/ 81.5
Ionisation potential( No./eV )	3/ 22.99

Mechanical Properties

Element	Value
Material condition	Polycrystalline
Material condition	Soft
Poisson's ratio	0.38
Poisson's ratio	0.38
Bulk modulus( GPa )	89.8
Bulk modulus( GPa )	89.8
Tensile modulus( GPa )	98
Tensile modulus( GPa )	98
Hardness - Vickers( kgf mm⁻² )	85-100
Tensile strength( MPa )	350-390
Yield strength( MPa )	250-310

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	44@20@20°C
Superconductivity critical temperature( K )	0.61
Temperature coefficient( K⁻¹ )	0.0044@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV )	1.17

Physical Properties

Element	Value
Boiling point( C )	4377
Density( gcm⁻³ )	6.49@20°C

Thermal Properties

Element	Value
Melting point( C )	1852
Latent heat of evaporation( J g⁻¹ )	6360
Latent heat of fusion( J g⁻¹ )	211
Specific heat( J K⁻¹ kg⁻¹ )	281@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	22.7@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	5.9@0-100°C